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  <div id="layout-content"><div id="reflectionclass.hasproperty" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">ReflectionClass::hasProperty</h1>
  <p class="verinfo">(PHP 5 &gt;= 5.1.2, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">ReflectionClass::hasProperty</span> &mdash; <span class="dc-title">检查属性是否已定义</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-reflectionclass.hasproperty-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="methodname"><strong>ReflectionClass::hasProperty</strong></span>(<span class="methodparam"><span class="type">string</span> <code class="parameter">$name</code></span>): <span class="type">bool</span></div>

  <p class="para rdfs-comment">
   检查指定的属性是否已定义。
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-reflectionclass.hasproperty-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>
    
     <dt>
<code class="parameter">name</code></dt>

     <dd>

      <p class="para">
       待检查的属性的名称。
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-reflectionclass.hasproperty-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   如果有这个属性返回 <strong><code>true</code></strong>，否则返回 <strong><code>false</code></strong>。
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-reflectionclass.hasproperty-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-5174">
    <p><strong>示例 #1 <span class="methodname"><strong>ReflectionClass::hasProperty()</strong></span> 例子</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /></span><span style="color: #007700">class&nbsp;</span><span style="color: #0000BB">Foo&nbsp;</span><span style="color: #007700">{<br />&nbsp;&nbsp;&nbsp;&nbsp;public&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">$p1</span><span style="color: #007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;protected&nbsp;</span><span style="color: #0000BB">$p2</span><span style="color: #007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;private&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">$p3</span><span style="color: #007700">;<br /><br />}<br /><br /></span><span style="color: #0000BB">$obj&nbsp;</span><span style="color: #007700">=&nbsp;new&nbsp;</span><span style="color: #0000BB">ReflectionObject</span><span style="color: #007700">(new&nbsp;</span><span style="color: #0000BB">Foo</span><span style="color: #007700">());<br /><br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$obj</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">hasProperty</span><span style="color: #007700">(</span><span style="color: #DD0000">"p1"</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$obj</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">hasProperty</span><span style="color: #007700">(</span><span style="color: #DD0000">"p2"</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$obj</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">hasProperty</span><span style="color: #007700">(</span><span style="color: #DD0000">"p3"</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$obj</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">hasProperty</span><span style="color: #007700">(</span><span style="color: #DD0000">"p4"</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

    <div class="example-contents"><p>以上例程的输出类似于：</p></div>
    <div class="example-contents screen">
<div class="cdata"><pre>
bool(true)
bool(true)
bool(true)
bool(false)
</pre></div>
    </div>
   </div>
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-reflectionclass.hasproperty-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="methodname"><a href="reflectionclass.hasconstant.html" class="methodname" rel="rdfs-seeAlso">ReflectionClass::hasConstant()</a> - 检查常量是否已经定义</span></li>
    <li class="member"><span class="methodname"><a href="reflectionclass.hasmethod.html" class="methodname" rel="rdfs-seeAlso">ReflectionClass::hasMethod()</a> - 检查方法是否已定义</span></li>
   </ul>
  </p>
 </div>


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